What are the key properties of transformer oil?

The key properties of transformer oil include high dielectric strength, which prevents electrical breakdown; excellent thermal conductivity for efficient heat dissipation; low viscosity to ensure proper circulation; and high flash and fire points for safety. Additionally, transformer oil should have good oxidation stability to prolong its lifespan and inhibit sludge formation, as well as low water content to prevent corrosion and maintain insulation integrity. These properties are essential for optimal transformer performance and reliability.